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  • 1
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    Analysis of tracking performance of the MTDD Costas loop for UQPSK signal (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The tracking performance of the breadboard Costas loop for the Multimegabit Telemetry Demodulator/Detector (MTDD) System using an unbalanced quadriphase-shift-keyed (UQPSK) signal is considered. The particular Costas loop is a biphase polarity type with passive arm filters. The loop contains a hard limiter in front of the third multiplier, which is a chopper-type device. The rms phase jitter predictions made have also been verified experimentally.
    Keywords: SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING
    Type: The Telecommun. and Data Acquisition Progr. Rept. 42-64; p 96-108
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
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    Experimental results on tracking performance of the MTDD Costas loop with UQPSK signal (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The carrier tracking performance of the breadboard Costas Loop of the Multimegabit Telemetry Demodulator Detector System was tested with unbalanced quadriphase shift keying (UQPSK) signals. An S-band UQPSK modulator was built for the tests. The experimental results are very close to the theoretical rms phase error calculations. The test and analysis show that the rms phase error for UQPSK signals is less than 5 deg at the design point if the I-to-Q channel power ratio is larger than 6 dB.
    Keywords: SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING
    Type: The Telecommun. and Data Acquisition Progr. Rept. 42-64; p 109-115
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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